| 1 | Wilson's School | 93.8 compositeOfsted28.3 Att832.2 EM5+33.3 | Grammar · Day · 6th | Wallington, London | Outstanding 2022-09-28×0.85 |
| 2 | Queen Elizabeth's School, Barnet | 93.0 compositeOfsted28.3 Att831.7 EM5+33.0 | Grammar · Day · 6th | Barnet, London | Outstanding 2022-05-17×0.85 |
| 3 | Sutton Grammar School | 84.1 compositeOfsted21.2 Att829.7 EM5+33.1 | Grammar · Day · 6th | Sutton, London | Good 2022-06-22×0.85 |
| 4 | Tiffin School | 83.3 compositeOfsted21.2 Att829.3 EM5+32.8 | Grammar · Day · 6th | Kingston upon Thames, London | Good 2022-05-24×0.85 |
| 5 | Ilford County High School | 81.7 compositeOfsted21.2 Att828.0 EM5+32.4 | Grammar · Day · 6th | Ilford, London | Good 2021-09-21×0.85 |
| 6 | Beths Grammar School | 80.4 compositeOfsted21.2 Att826.5 EM5+32.6 | Grammar · Day · 6th | Bexley, London | Good 2022-05-04×0.85 |
| 7 | The Cardinal Vaughan Memorial RC School | 80.0 compositeOfsted28.3 Att824.9 EM5+26.7 | Academy · Day · 6th | London, London | Outstanding 2021-11-16×0.85 |
| 8 | Gunnersbury Catholic School | 78.8 compositeOfsted28.3 Att823.5 EM5+26.9 | State · Day · 6th | Brentford, London | Outstanding 2023-01-17×0.85 |
| 9 | The London Oratory School | 77.3 compositeOfsted28.3 Att823.1 EM5+25.9 | Academy · Day · 6th | London, London | Outstanding 2022-09-13×0.85 |
| 10 | Richard Challoner School | 75.2 compositeOfsted28.3 Att822.0 EM5+24.9 | Academy · Day · 6th | New Malden, London | Outstanding 2022-11-22×0.85 |
| 11 | St Olave's and St Saviour's Grammar School | 75.2 composite | Grammar · Day · 6th | Orpington, London | — 2024-11-05 |
| 12 | Wallington County Grammar School | 72.4 composite | Grammar · Day · 6th | Wallington, London | — 2022-11-16 |
| 13 | Harris Boys' Academy East Dulwich | 72.3 compositeOfsted33.3 Att820.6 EM5+18.4 | Academy · Day · 6th | London, London | Outstanding 2023-11-28 |
| 14 | Hasmonean High School for Boys | 70.6 compositeOfsted25.0 Att820.9 EM5+24.6 | Academy · Day · 6th | London, London | Good 2023-11-07 |
| 15 | The Fulham Boys School | 67.3 compositeOfsted21.2 Att822.7 EM5+23.3 | Free School · Day · 6th | London, London | Good 2022-10-11×0.85 |
| 16 | Forest Hill School | 63.9 compositeOfsted25.0 Att819.4 EM5+19.6 | State · Day · 6th | London, London | Good 2023-12-13 |
| 17 | St Bonaventure's RC School | 61.5 compositeOfsted28.3 Att817.5 EM5+15.6 | State · Day · 6th | London, London | Outstanding 2022-11-29×0.85 |
| 18 | Bullers Wood School for Boys | 58.4 compositeOfsted21.2 Att818.1 EM5+19.0 | Free School · Day | Bromley, London | Good 2023-02-07×0.85 |
| 19 | Finchley Catholic High School | 57.6 composite | State · Day · 6th | London, London | — 2023-09-27 |
| 20 | Southborough High School | 56.2 compositeOfsted21.2 Att817.9 EM5+17.1 | Academy · Day · 6th | Surbiton, London | Good 2023-02-02×0.85 |
| 21 | The St Thomas the Apostle College | 54.8 composite | State · Day · 6th | London, London | — 2024-11-06 |
| 22 | Isleworth and Syon School for Boys | 53.7 compositeOfsted25.0 Att816.0 EM5+12.8 | Academy · Day · 6th | Isleworth, London | Good 2023-11-14 |
| 23 | Ernest Bevin Academy | 52.6 compositeOfsted21.2 Att816.5 EM5+14.9 | Academy · Day · 6th | London, London | Good 2022-06-07×0.85 |
| 24 | Rutlish School | 52.5 composite | State · Day · 6th | London, London | — 2024-09-24 |
| 25 | Carshalton Boys Sports College | 52.5 compositeOfsted21.2 Att816.7 EM5+14.5 | Academy · Day · 6th | Carshalton, London | Good 2022-10-18×0.85 |